The analogy used in the book referred to the axon membrane as a gatekeeper. This means that the membrane:
A)determines whether a glial cell can pass through the axon.
B)controls the balance of positive and negative ions on the interior and exterior of the axon.
C)operates in an all-or-none fashion, either opening to allow neurotransmitters to pass or not.
D)uses the nodes of Ranvier to allow some ions to move out of the axon and neurotransmitters to move into the axon.

Question

Quizplus · Accepted Answer

The axon membrane acts as a gatekeeper by controlling the movement of ions across the membrane, thus maintaining the balance of positive and negative ions inside and outside the axon. This is crucial for the generation and propagation of nerve impulses.

The Analogy Used in the Book Referred to the Axon